--enable-cleartext-plugin – A value that specifies
that AWSAuthenticationPlugin must be used for this
connection.

--user – The database account that you want to
access.

--password – A signed IAM authentication
token.

The authentication token consists of several hundred characters. It can be
unwieldy on the command line. One way to work around this is to save the token
to an environment variable, and then use that variable when you connect. The
following example shows one way to perform this workaround.